import com.fasterxml.jackson.databind.ObjectMapper;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * Created with IntelliJ IDEA
 * Description:
 * User: Administrator
 * Data: 2023 - 11 - 05
 * Time: 12:08
 */
class Request {
    public String aa;
    public String bb;
}
class Response {
    public String aa;
    public String bb;
}
@WebServlet("/json")
public class JsonParameterServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        ObjectMapper objectMapper = new ObjectMapper();
        Request request = objectMapper.readValue(req.getInputStream(), Request.class);
        Response response = new Response();
        response.aa = request.aa;
        response.bb = request.bb;
        String respJson = objectMapper.writeValueAsString(response);
        resp.setContentType("text/html; charset=utf-8");
        resp.getWriter().write(respJson);
    }
}
